Stream Method Proposal: long count(Predicate<? super T> predicate)
jhg023 at bucknell.edu
Thu Nov 8 00:57:22 UTC 2018
I see myself having to often call count() as a terminal operation on a
Stream immediately after performing a filter operation. How feasible would
it be to add an overloaded count() method that accepts a Predicate, which
it uses as a filter before returning the count of elements in the Stream?
If this is supported, I'd gladly create the webrev & tests for it!
I suppose the method signature can be something along the lines of:
long count(Predicate<? super T> predicate)
It would also seem reasonable to give this method to IntStream,
DoubleStream, and LongStream, but allowing them to use IntPredicate,
DoublePredicate, and LongPredicate respectively.
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